F350 4wd that couldn't pull itself out of wet grass - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 16 (permalink) Old 12-27-2011, 01:33 PM Thread Starter
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F350 4wd that couldn't pull itself out of wet grass

Got a question for you fellers:


I have a 2008 F350 4wd, AT, manual lock hubs, manual 4wd shifter.


Call me old school, but growing up I had 4wd rice rockets with the manual hubs. I like to know if its locked or not instead of a light on the dash telling me.

So I thought anyway. Here's the story:

After dropping off couple of guys at there deer stands I encountered some soft ground and my worn out tires caked up and started to spin- of course i lock the hubs, drop in 4wd high and nothing..... back tires spin......drop to 4wd low and same thing...... well I'm 2 1/2 miles from my deer stand so I started the hike- no big deal isn't like the trucks going anywhere.

elmerfudd

After the hunt (not seeing anything) I get back to truck and notice the front tires had not been spinning. did finally manage to rock the beast out in 2 1/16 drive- I say this because it appeared the front tires were partially engaging- more it almost seemed in reverse or when rocking the truck.

This happened several more times during the day.

Now for the stats and questions:

2wd in park- front drive shaft turns, passenger side yolk turns, drivers side does not. Why doesn't the drivers side turn?

4wd in park- front drive shaft is engaged- it won't budge- I know transfer case is not the issue- whew!!

Haven't tried this, but I am getting ready to walk out side:

If the hubs are locked and its in 2wd the front shaft should be locked correct?
if the shaft still turns it means the hubs are not engaging and thats the issue.

How hard are those to tackle- hopefully its as simple as removing some screws and driving the pin out, greasing and reassemble?

Still leaves the question as to why the drivers side yolk isn't turning, unless its limited slip and i didn't turn the shaft enough.


Sorry for the long post and many thanks in advance for assistance.

Chris
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post #2 of 16 (permalink) Old 12-28-2011, 05:26 PM
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It sounds like the hubs are not engaging properly. The pulse-lock hubs require some wheel movement to engage, and use vacuum connections which can be a bit vulnerable to damage from road debries. You may not have had the wheels turning enough to engage the hubs if you didn't switch to 4wd before getting stuck. You can manually lock the hubs in those cases by turning the knobs on the hubs from auto to lock.
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post #3 of 16 (permalink) Old 12-29-2011, 01:32 AM Thread Starter
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Thanks WP, but I have the manual hubs, with the manual transfer case. After getting unstuck I did leave it in 4wd thinking the same thing, but that was not the case.
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post #4 of 16 (permalink) Old 12-29-2011, 02:14 AM
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Well, if you have manual hubs it sounds like at least one is broken. I believe they come apart fairly easily and aren't that expensive to replace.
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post #5 of 16 (permalink) Old 12-29-2011, 02:15 PM Thread Starter
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ok yes I just tried locking hubs and turning front drive shaft. Figured if they were locked in it should not turn. They do turn so I guess either the spring or something is broken.

I did talk the mechanic that did some work for me and he said I could take it to his house this weekend and we could work on it. I have messed with them so I would rather look over an experts shoulders and learn.


Chris
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post #6 of 16 (permalink) Old 01-03-2012, 05:59 PM Thread Starter
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The passenger side hub was fried. About every 3rd tooth was busted. $150 later and I'm now up and running.
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post #7 of 16 (permalink) Old 01-03-2012, 10:56 PM
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Good to hear it's fixed. Doesn't sound like it was too bad.
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post #8 of 16 (permalink) Old 05-05-2012, 09:38 PM Thread Starter
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Back to the SOS. Both hubs replaced and still not working. Sounds like its popping out of gear in transfer case. Anyone else heard of this issue?
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post #9 of 16 (permalink) Old 06-28-2012, 05:51 PM
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I haven't heard of that issue, but it makes me think of possibilities like the transfer case shifter link needing adjustment, or body and/or trans mounts that are worn out and letting things shift too much under load.
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post #10 of 16 (permalink) Old 06-28-2012, 08:56 PM Thread Starter
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Quote:
Originally Posted by wp6529 View Post
I haven't heard of that issue, but it makes me think of possibilities like the transfer case shifter link needing adjustment, or body and/or trans mounts that are worn out and letting things shift too much under load.
Great idea. Thanks. Sounds like you have some experience with this problem?


Chris
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